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/*
24 bit
*/
/*
* OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
* Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
* All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
static void
rfbInitOneRGBTable24 (uint8_t *table, int inMax, int outMax, int outShift,int swap);
static void
rfbInitColourMapSingleTable24(char **table, rfbPixelFormat *in,
rfbPixelFormat *out,rfbColourMap* colourMap)
{
uint32_t i, r, g, b, outValue;
uint8_t *t;
uint8_t c;
unsigned int nEntries = 1 << in->bitsPerPixel;
int shift = colourMap->is16?16:8;
if (*table) free(*table);
*table = (char *)malloc(nEntries * 3 + 1);
t = (uint8_t *)*table;
for (i = 0; i < nEntries; i++) {
r = g = b = 0;
if(i < colourMap->count) {
if(colourMap->is16) {
r = colourMap->data.shorts[3*i+0];
g = colourMap->data.shorts[3*i+1];
b = colourMap->data.shorts[3*i+2];
} else {
r = colourMap->data.bytes[3*i+0];
g = colourMap->data.bytes[3*i+1];
b = colourMap->data.bytes[3*i+2];
}
}
outValue = ((((r * (1 + out->redMax)) >> shift) << out->redShift) |
(((g * (1 + out->greenMax)) >> shift) << out->greenShift) |
(((b * (1 + out->blueMax)) >> shift) << out->blueShift));
*(uint32_t*)&t[3*i] = outValue;
if(!rfbEndianTest)
memmove(t+3*i,t+3*i+1,3);
if (out->bigEndian != in->bigEndian) {
c = t[3*i]; t[3*i] = t[3*i+2]; t[3*i+2] = c;
}
}
}
/*
* rfbInitTrueColourSingleTable sets up a single lookup table for truecolour
* translation.
*/
static void
rfbInitTrueColourSingleTable24 (char **table, rfbPixelFormat *in,
rfbPixelFormat *out)
{
int i,outValue;
int inRed, inGreen, inBlue, outRed, outGreen, outBlue;
uint8_t *t;
uint8_t c;
int nEntries = 1 << in->bitsPerPixel;
if (*table) free(*table);
*table = (char *)malloc(nEntries * 3 + 1);
t = (uint8_t *)*table;
for (i = 0; i < nEntries; i++) {
inRed = (i >> in->redShift) & in->redMax;
inGreen = (i >> in->greenShift) & in->greenMax;
inBlue = (i >> in->blueShift) & in->blueMax;
outRed = (inRed * out->redMax + in->redMax / 2) / in->redMax;
outGreen = (inGreen * out->greenMax + in->greenMax / 2) / in->greenMax;
outBlue = (inBlue * out->blueMax + in->blueMax / 2) / in->blueMax;
outValue = ((outRed << out->redShift) |
(outGreen << out->greenShift) |
(outBlue << out->blueShift));
*(uint32_t*)&t[3*i] = outValue;
if(!rfbEndianTest)
memmove(t+3*i,t+3*i+1,3);
if (out->bigEndian != in->bigEndian) {
c = t[3*i]; t[3*i] = t[3*i+2]; t[3*i+2] = c;
}
}
}
/*
* rfbInitTrueColourRGBTables sets up three separate lookup tables for the
* red, green and blue values.
*/
static void
rfbInitTrueColourRGBTables24 (char **table, rfbPixelFormat *in,
rfbPixelFormat *out)
{
uint8_t *redTable;
uint8_t *greenTable;
uint8_t *blueTable;
if (*table) free(*table);
*table = (char *)malloc((in->redMax + in->greenMax + in->blueMax + 3)
* 3 + 1);
redTable = (uint8_t *)*table;
greenTable = redTable + 3*(in->redMax + 1);
blueTable = greenTable + 3*(in->greenMax + 1);
rfbInitOneRGBTable24 (redTable, in->redMax, out->redMax,
out->redShift, (out->bigEndian != in->bigEndian));
rfbInitOneRGBTable24 (greenTable, in->greenMax, out->greenMax,
out->greenShift, (out->bigEndian != in->bigEndian));
rfbInitOneRGBTable24 (blueTable, in->blueMax, out->blueMax,
out->blueShift, (out->bigEndian != in->bigEndian));
}
static void
rfbInitOneRGBTable24 (uint8_t *table, int inMax, int outMax, int outShift,
int swap)
{
int i;
int nEntries = inMax + 1;
uint32_t outValue;
uint8_t c;
for (i = 0; i < nEntries; i++) {
outValue = ((i * outMax + inMax / 2) / inMax) << outShift;
*(uint32_t *)&table[3*i] = outValue;
if(!rfbEndianTest) {
memmove(table+3*i,table+3*i+1,3);
}
if (swap) {
c = table[3*i]; table[3*i] = table[3*i+2];
table[3*i+2] = c;
}
}
}
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